.aboutroll,
.intro,
.icons {
    max-width: 1080px;
    margin: 0 auto;
}

.aboutroll {
    text-align: center;
    margin: 0 auto;
}

.aboutroll .col-4 {
    padding: 5px;
}

.aboutroll .item {
    background: #D7D7D7;
    padding: 20px 0;
    border-radius: 5px;
}

.aboutroll .item:hover {
    background: #9DC914;
}

.aboutroll .item h6 {
    font-weight: bold;
}

.aboutroll .item h6 b {
    vertical-align: text-top;
    font-size: 0.8em;
}

.aboutroll .item p {
    font-size: 14px;
}

.aboutroll .rollnum,
.aboutroll .rollnum .numItem,
.aboutroll .item h6 span {
    height: 36px;
    line-height: 36px;
}

.aboutroll .item h6,
.aboutroll .rollnum .nums span {
    font-size: 30px;
}

.aboutroll .rollnum .numItem {
    width: 18px;
}

@media (max-width: 768px) {

    .aboutroll .item h6,
    .aboutroll .rollnum .nums span {
        font-size: 20px;
    }
}

.intro {
    padding-top: 50px;
    font-size: 17px;
    text-align: center;
}

.intro h3 {
    text-align: center;
    border-bottom: 3px solid #9DC914;
    display: inline-block;
    margin: 0 auto;
    line-height: 50px;
}

.intro h5 {
    padding: 20px 0 50px 0;
    text-align: center;
    color: #555
}

.intro p {
    text-align: left;
    color: #666
}

.intro img {
    max-width: 100%;
}

.icons div {
    padding-top: 20px;
}

.history {
    display: flex;
    background: url(../img/about/process-bg.png) center center no-repeat;
    background-size: 100%;
}

.history li {
    text-align: center;
    background: url(../img/about/process-dot.png) center 268px no-repeat;
    padding-top: 350px;
    cursor: pointer;
    font-size: 14px;
    position: relative;
}

.history li em {
    font-style: normal;
    font-size: 36px;
    font-weight: bold;
    border-bottom: 3px solid #FAC752;
    display: inline-block;
}

.history li:nth-child(even) {
    transform: rotate(180deg);
}

.history li:nth-child(even) em,
.history li:nth-child(even) p,
.history li:nth-child(even) img {
    transform: rotate(180deg);
}
.history li img{
    display: none;
    position: absolute;
    top:0;
    left:0;
    z-index: 9;
    max-width: none;
    transition: all 300ms;
}
.history li:hover img{
    display: block;
}
@media(max-width:720px){
    .history {
        overflow-x: auto;
    }
    .history li:hover img{
        display: none;
    }
}